BA 349 then SK 810 at Heathrow
Nice → London → Oslo
Timetable, London time
21:05BA 349 from Nice at the gate
17:30SK 810 to Oslo leaves the gate
20 h 25 apart on the timetable, overnight
SK 810 leaves 20 h 25 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.